DongHoon Yi

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Sub-Gbps Uncompressed HDTV over IP Trials
APAN 19th Bangkok Meeting

• DongHoon Yi
• 2005/ 1/ 26
• dhyi_at_netmedia.gist.ac.kr
• Networked Media Laboratory
• Dept. of Information Communications
• Gwang-Ju Institute of Science Technology

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Contents

• Uncompressed HD Streaming system
• Decompressed-Live HDV (221Mbps)
• Uncompressed-Stored HDTV (885Mbps)
• Compressed HDTV (SMPTE 305M , 270Mbps) Streaming
• Uncompressed HDTV (SMPTE 274M,1.2Gbps) Streaming

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Uncompressed HD streaming system
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Decompressed-Live HDV (221Mbps)

• Goal Pre-experiments of several hundreds Mbps
  HDTV stream
• Too expensive HDTV camera
• Pre-development of uncompressed HDTV system
• Feature
• 1280x720 progressive, 30fps
• YV12 Planar YUV format, 8-bpp 2x2 U and V planes
• UDP Socket Tuning
• Burst sending and then rest
• Sender - Non-blocking, Big Sending Buffer
• Blocking mode can avoid packet loss in sending
  buffer
• ? Performance is poor (Data loss between
  sender module and decoder module)
• Better performance by Non-blocking mode
• Avoid packet loss by big sending buffer
• Receiver - Blocking, Big Receiving Buffer
• Non-blocking receiving socket waste computation
  time to check whether it receive or not.

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Decompressed-Live HDV (221Mbps)

• Implementation (based on Windows DirectX)
• Experiments
• KAIST ? GIST
• IPv6 VLAN
• 220270Mbps

Client
Server
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Uncompressed-Stored HDTV (885Mbps)

• System Details

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Uncompressed-Stored HDTV (885Mbps)

• H/W Issues
• NIC - Different NIC shows different performance
• Intel 1Gbps NIC showed the best performance
• Disk read up speed
• Old type of DISK I/O can be bottleneck
• LAN cable
• Cat6 is better than Cat5
• S/W Issues
• Burst streaming
• By giving some delay inter-packet, burst packet
  sending is fixed.
• Other Issues
• Acquisition of 720p video file.
• Generated by 3D production tool (Alias Maya)
• Future works
• 1080i supports
• Multi-channel 1080i streaming

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Uncompressed-Stored HDTV (885Mbps)

• Demonstration

KOREN Workshop (Dec. 3th 2004)
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Compressed HDTV (SMPTE 305M , 270Mbps) Streaming

• Demonstration between Korea and Barcelona
• System information
• ResearchChannels S/W
• Resolution 1080i
• Compressed by SONY HDCAM Codec
• Transport format SMPTE 305M(SDTI)
• Sender
• Workstation with Gigabit NIC
• Stored HD file
• Receiver
• Decoder Box
• SONY HDCAM Decoder, Demultiplexer, D/A Converter
• Workstation with Gbit NIC, SDTI Interface
  card(VideoPump)
• Display device

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Compressed HDTV (SMPTE 305M , 270Mbps) Streaming

• International Lightpath provisioning

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Compressed HDTV (SMPTE 305M , 270Mbps) Streaming

• System Specifications

PDP Display
270Mbps Stream Receiver System
Audio Speaker
Audio AMP, Mixer
Audio D/A Converter
Video D/A Converter Demuxer, Decoder
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Uncompressed HDTV (SMPTE 274M,1.2Gbps) Streaming

• Developed in GIST
• HD Contents
• SONY HDCAM, SMPTE 274M standard
• 1920X1080/59.94/I, 1125 lines per frame (Active
  line 1080 lines)
• Server
• NAS (Storage system), Workstation with GbE.
• Client
• Workstation with GbE.
• VideoPump, SONY Demultiplexer and D/A Converter,
  Display device (PDP)